Tool-holder for pneumatic hammers.



V. E. LANE. TOOL HOLDER. FOR PNEUMATIC BANNERS APPLICATION TILEDMAB-10,1909.

Patented Mar. 1,1910.

INVENTOR "1/111?!" 15- Lan a stem 5 extending into the-barrel 3.

VICTOR EDWARD LANE, OF BERWICK, PENNSYLVANIA;

TOOL-HOLDER FOR PNEUMATIC' HAMMERS.

Specification of Letters Patent. Patented M 'ari 1, 1910;

Application filed March 10, 1909. Serial No. 482.549.

To all whom it may concern:

Be it known that I, VICTOR EDWARD LANE, a citizen of the United States,and a resident of Berwick, in the county of Columbia and State ofPennsylvania, have invented a new and Improved Tool-Holder for PneumaticHann'ners, of which the following is a full, clear, and exactdescription.

My invention relates to tool holders for pneumatic hammers, my moreparticular purpose being to provide a construction adapted to retain thetool in proper working relation to the hammer, allowing the tool" allnecessary freedom and effectively preventing the tool from beingunexpectedly ejected from the hammer so as to cause an accident.

More particularly stated, my invention comprehends a hammer barrel towhich is operatively connected a rivet set or tool. by aid ofappropriate connections which allow the rivet set or tool to be readilyremoved, when desired, from the barrel, but prevent such removaloccurring accidentally.

Reference is to be had to the accompanying drawings forming a part ofthis specification, i'n which similar characters of reference indicatecorrespondingparts in both the. figures.

Figure 1 a side view, partly in elevation and partly, in section,showing part of a hammer barrel and a rivet set extending partly intosaid barrel and provided with a neclr. this view flll'tlltllfillOW111gpins which extend radially inward toward said neck, and a bandencircling the pins to prevent their unauthorized removal; and Fig.2 isa vertical central section upon the line 2+1- ol: Fig. 1, looking in thedirection of the arrow, and showing the neck of the tool, and furthershowing the pins for preventing the removal ot the tool from the barrel,this view further showing how the band is fitted upon the bar reel inorder to hold the pins in position.

At 3 is a cylindrical barrel forming part of a pneumatic hammer.

At 4 is u rivet set which is provided with This stem is provided with aneck 6 of reduced diameter.

At 7, 8 are pins which'are provided with heads 10, the heads beingsunken slightly into the barrel 3.

At 11 is a band consisting of a strip of -posit ion.

sheet sprin metal bentsubstantially into the form o a circle. One end ofthe strip is shown at 12 and is'bent slightly inward,

enterin a' notch 13. The opposite end 14' of the and slightly overlapsthis-notch 13. The band 11 as a whole is sunken slightly into the barrel3, so that the outer surface of the band is substantially flush with theouter surface of the barrel. "The band cugages directly the heads 9, 10of the pins 7. 8 and normally prevents the removal of these pins. Exceptfor the band, however, the pins may be easily removed and the rivet setthereupon released from the barrel. The pins 7, 8 are provided withannular bevels 1.5, 16, and the stem 5 is provided with beveledshoulders17 18, 19 of annular form.

My invention is used as follows: In order to assemblethe parts, the stem5 of the rivet. set is extended a little way into the end of the barrel.The pins 7, 8 are neirt placed; in position so that the points of thesepins loosely engage, or at least closely approach in position, the outersurface of theneck (3. The band 11 is next placed in position, theportion 12 being slipped into the notch 13 and the end 1% beingbroughtpartially over the notch 13. The band being made of spring materialclings upon the barrel 3 and causes no inconvenience in handling thehanin'ier. The rivet set 1 is now free to play in the general directionof its axis and when actuated in the usual manner is capable of:conferring its power upon the rivet or other object to be driven. Inorder to remove the rivet set. the operator (using an implement for thepurpose, if he so desires) raises the ends 11 of the band 11 and slipsthis band 01f, prying the inturned portion 12 out from the notch 13. Thepins T, 8 are next removed, which is easily done as they merelyfitneatly in The rivet set is nowfree and can be taken out. If. desired,however, the rivet set can be removed from the hammer barrel much morequickly than in the manner above described. The operator, by graspingthe rivet set and givmg it a quick jerk, can extricate it from thebarrel. This is because the bevel 17 rides upon the bevels 15, 16,forcing the pins 7, 8 outwardly so that the rivet set becomesdisengaged. In order to replace the rivet set, it is pushed quickly intothe barrel so that the annular shoulder 18, being beveled as shown andlodging a ainst the annular bevels 15, 16, on the pins 8, forces thesepins apart. In

either taking the rivet set out or putting it back in this manner, theband 11 springs outwardly a little.

While my intention is to prevent the rivet set from being forciblyejected by any accidental means, I do not intend to prevent it frombeing removed-quickly and at will by the operator, and that, too,without the ne- 5 cessity for taking off the band 11 or removing thepins. i

In the construction above described the rivetfset is normally held in.its working position and is prevented from falling out, in

case the barrel of the hammer is pointed 1 downwardly and the rivet sethappens not readily occur. It, the hammer unexpectedly makes a stroke,the rivetset is driven for- Ward 21- measured distance, just as it wouldbe in striking the working blow, and is stopped by the pins 7, 8. Whileforcon- As is well known by persons accustomed to handle pneumatichammers. there is danger of the rivet set. being thrown violently fromthe barrel, as, for instance, by some unaupneumatic hammer, or from someaccidental disturbance of the trigger or parts afleeled by the latter..In fact, itis nothing unusual for the rivet set to be eiected soviolenily that it acts like a projectile and would prob-- venience Ihave described the member 4 as a rivet set, it will be understood that Ido not limitinyself thereby, as many other tools are well known in thisart as equivalents for a rivet set of the type shown. Neither do 1 limitmyself to the particular form of the band 11. This band is for somepurposes essentially a clip, and it is obvious that clips of other formsmay be en'iployed in the rela tion above described.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

The combination of a barrel provided eX- ternally with a notch, a clipmade of spring metal and provided with an inturned portion extendinginto said notch, said clip having generally a circular form andextending substantially around said barrel. a pin extending radiallythrough said barrel and held in position by said clip, and a. rivet set1 provided with a. stem extendinginto said thorlzed person pulling thetrigger of the 5 barrel, said stem being provided with a redue-edportion disposed adjacent to said pin.

ably kill a person should it happen to strike l him in a vital part. Byaid of my inver tion, however, such an accident can not l n testimonywhereof I have signed my name to this specification in the presence oftwo suhseribing witnesses.

Vl GTOR El) W A RD TJ1\ N E.

i tnesses Mnzmr: l'VAnnioJ-L Pam-1N T. Gnoir.

